Impedance mounting device



Sept. 1l, 1962 W. H. WEST IMPEDANCE MOUNTING DEVICE tts The field ofthis invention is that of impedance mounting devices, and relates, moreparticularly, to coil mounting devices for use in conjunction withprinted circuits.

Objects of this invention are to provide an impedance mounting devicewhich is simple and compact, Which can be conveniently and inexpensivelyconstructed, which is reliable in use, and which is particularly adaptedfor use in conjunction with printed circuits.

In brief summary, impedance mounting devices according to the inventioncomprise a tubular body for supporting impedance means, one or morecollars mounted on the body, each collar having a portion extendingtransversely of the body for receiving terminal means, and

one or more terminals made from angular blanks mounted on respectivecollar extensions, each terminal being bent around a collar extension sothat one leg of the blank extends transversely of and away from thebody, which leg is adapted for connecting the device in an electricalcircuit, whereas the inner portion of the other leg of the blank iswrapped around the collar extension for attaching the terminal to thecollar, so that the end of this other leg extends transversely of thebody and of the rst leg, the said leg end being adapted for connectionto the impedance means.

In -a more specic aspect, the collar extension is notched intermediateits length. The terminal is wrapped around the collar extension at thenotch and is thereby located and held on the collar extension.

In another aspect of this invention, the collar has the form of a platehaving a portion extending transversely of the tubular body, thisextending portion being apertured for receiving terminal means. In thisembodiment, two terminals made from identical angular blanks areinserted within the collar aperture and bent so that one leg of eachblank extends transversely of and away from the body `and parallel tothe corresponding leg of the other terminal blank, vboth legs beingadapted for connecting the device in `an electrical circuit, so that theiuner portion of the other leg of each terminal blank is foldedcompletely around opposite marginal portions of the collar between theaperture and the collar extension periphery for attaching the terminalsto the collar, and so that the end of the other leg of each blankextends transversely of the body and of the rst leg of said blank andoppositely of the corresponding leg of the other terminal blank, the legends `being adapted for connection to the impedance means.

These and other objects, aspects of novelty, and advantages of theinvention will appear from the following description of a specificembodiment thereof.

The description refers to a drawing in which:

FIG. 1 is a side elevation of the impedance mounting device of theinvention;

FIG. 2 is an end elevation of the device of FIG. 1;

FIG. 3 is a section along line 3 3 of FIG. 2;

FIG. 4 is lan end elevation of the collar of this invention;

FIG. 5. is an end elevation of another embodiment of the collar;

FIG. 6 is an isometric view of the terminals of the invention as theyappear before attachment to the collar; and

3,54,98Z Patented Sept. 11, 1962 FIG. 7 is an isometric view of theterminals of FIG. 6 as they appear after attachment to the collar.

Referring to the drawings, 1 indicates the impedance mounting device ofthis invention, here illustrated as a horizontal coil form adapted foruse with a printed circuit. The printed circuit panel is represented bythe dotted lines 2. The coil lform comprises `a cylindrical tube 3,preferably of ceramic material, having the axial, internally threadedbore 4, and having the externally threaded core 6 engaged therewith.Adjustment of the core within the bore 4 varies the impedance effectedby the inductance coil 7 which is wound upon the tube 3. It should beunderstood the electrical construction of the impedance means is notpart of the present invention and that other impedance affecting devicescan be used within the scope of this invention. Thus the core 6 may beomitted to provide an inductance coil 7 which is not variable or thecoil 7 may be primarily of resistive effect.

A collar 8 of insulating material such as Fiberglas is mounted adjacenteach end of the coil form by means of the aperture 9 and the adhesive11. An epoxy resin is considered a suitable adhesive for this purpose.The collar 8, as shown in FIG. 4, may comprise a plate having a circularportion 12 containing the aperture 9 and a lsubstantially rectilinearterminal extension 13 containing the aperture 14.

Though the apertures 9 and 14 each preferably has a completely closedperiphery it should be understood that either might be broken at somepoint and remain within the contemplation of the present invention.

Identical dat angular terminal blanks 16 having the legs 17 and 1S, asillustrated in FIGS. 6 `and 7, are used according to this invention, theinner portion of the leg 1S of each blank being bent into a U-shapedconfiguration, preferably before the terminal blanks are associated withthe collars 3. As `shown in `FIG. 6, bending of the legs 18 of identicalblanks 16 in opposite directions provides right-hand and left-handterminals 19 and 21 respectively, which are otherwise identical. Thelegs 1S of a right-hand and left-hand terminal can be inserted into eachcollar aperture 14, the dotted lines 22 in FIG. 3 indicating the legs 18as inserted, and bent outwardly, as indicated by the arrows Z3 in FIG.3, to clamp the marginal portions 24 and 26 respectively, of the collarextension 13. A perspective View of `a pair of the terminals 19 and 21,as bent to clamp the marginal portions 24 and 26 respectively, is shownin FIG. 7, the terminals being shown removed from the collar 8.

The legs 17 and 18 of the terminals 19 and 21 may be notched, as at Z7,for facilitating electrical connection thereto. The terminals areconstructed of suitably conductive material such as aluminum or brassand may be plated with a solder metal for further facilitatingelectrical connection thereto.

As Will be noted in FIG. l, the legs 17 of the terminals 19 and 21extend transversely and away from the tubular body 3 for convenientconnection to the printed circuit board 2. The legs 17 can be insertedinto apertures as at 28, in the printed circuit board and can also bebent over and soldered to the printed circuit if desired. .T-he faces 30of the collars `8, as shown in FIG. l, rest directly upon the printedcircuit panel 2 thereby supporting the coil form 1 a proper distanceabove the panel. 'I'he to the collars 8 for supplementing the clampeffect of the i bent terminal legs 18. llt will also be noted that thecoil mounting device of this invention can be conveniently, rapidly andinexpensively assembled from inexpensive component parts, that thedevice as assembled is compact and simple, that the terminals 19 and 21can be easily replaced with longer or shorter terminals as desired, andthat the device can be provided with a plurality of terminals withoutfear of shorting occurring between the terminals.

The faces 29 of the collar apertures 14 are preferably parallel to theperipheral edges 31 of the extensions 13, and are preferably of a lengthL only slightly larger than the width w of the terminal blank. legs 18,whereby the faces 32 of the apertures 14 conveniently and securelylocate and hold the terminals 19 and 21.

FIG. illustrates an alternative embodiment of the collar of thisinvention showing the collar 8.1 comprising the circular portion 12.1containing the aperture 9.1 and the terminal extensions 214.1 and 26.1.The faces 33 of the extensions 24.1 and 26:1 extend transversely of theaperture 9.1 and are notched, as at 34, for receiving the terminals 19and 21, the faces 36 of the notches serving to locate and hold saidterminals on the extensions. The faces '30.1 and 30.2 of the collarextensions 24.1 and 26.1 serve to support the impedance device 1 abovethe printed circuit panel 2.

It should be understood that although particular embodiments of theimpedance supporting device of this invention have been shown by way ofillustration, this invention includes all modifications and equivalentswhich fall within the scope of the appended claims.

1. A coil-mounting device comprising a tubular body for supporting acoil; a pair of collars one of which is mounted on the body adjacenteach end of the body, each of said collars having a portion extendingtransversely of the body and having an aperture for receiving terminals;a left-hand terminal extending through the aperture in one of saidcollars, said terminal having a portion abutting the side of saidaperture, an end portion extending from the aperture along one side ofthe collar transversely of the body, and another end portion extendingfrom the aperture along the opposite side of said collar transversely ofthe body, said other end portion further extending along the peripheraledge of the collar for attaching the terminal to said collar, and saidother end portion further extending transversely of the body andsaidfnst end portion; a right-hand terminal extend- `ing through theaperture in said collar and having a portion abutting the side of saidaperture opposite said left-hand terminal, said right-hand terminalbeing a mirror image of said left-handrterminal; and a pair of terminalsextending through the aperture in the other of said collars, said pairof terminals being a mirror image of the terminal pair comprising saidleft-hand and righthand terminals. K

2.V An impedance mounting device comprising -a tubular body forsupporting limpedance means; a collar mounted on the body adjacenteither end thereof, each of said collars having a terminal portion withan aperture therein for receiving terminals, extending transversely ofthe body; and four terminals, Veach having identical legs, mounted inpairs within said collar apertures, each Vof/said terminals having oneleg extending transversely of and away from the body parallel to thecorresponing legs of the other terminal, said legs being adapted for.connection in an electrical circuit, each of said terminals having theinner portion of the other legs of each terminal extending around amarginal portion of Vits respective collar between the terminal apertureand the collar periphery for attaching the terminals to the collars,theY end of the other leg of each terminal extending transversely of thebody and of its iirst leg and oppositely of the corresponding leg of theother terminal in its pair, said leg ends being adapted for connectionto said impedance means.

3. A coil-mounting device comprising a tubular body for supporting acoil; a collar mounted on the body adjacent an endV of the body, saidcollar having a portion extending transversely of the body and having anaperture for receiving terminals; a left-hand terminal extending throughsaid aperture, said terminal having a portion abutting the side of saidaperture, an end portion extending from the aperture along one side ofthe collar transversely of the body, and another end portion extendingfrom the aperture along the opposite side of said collar transversely ofthe body, said other end portion further extending along the peripheraledge of the collar for attaching the terminal to said collar, and saidother end portion further extending transversely of the body and saidfirst end portion; and a right-hand terminal extending through saidaperture and having a portion abutting the side of said apertureopposite said left-hand terminal, said right-hand terminal being amirror image of said left-hand terminal.

4. An impedance mounting device comprising a tubular body for supportingimpedance means; a collar mounted on th body adjacent an end thereof,said collar having a terminal portion with an aperture therein forreceiving terminals, extending transversely of the body; and twoterminals each having identical legs mounted within said collaraperture, said terminals having one leg extending transversely of andaway from the body parallelV to the corresponding legs of the otherterminal, said legs being adapted for connection in an electricalcircuit, each of said terminals having the inner portion of the otherleg of each terminal extending around a marginal portion of itsrespective collar between the terminal aperture and the collar peripheryfor attaching the terminals to the collars, the end of the other leg ofeach terminal extending transversely of the body and of its first legand oppositely of the corresponding leg of the other terminal, said legends being adapted for connection to said impedance means.

5. An electrical impedance device comprising: a tubular body formounting impedance means; a collar mounted adjacent one end -of thetubular body and having a transversely projecting terminal portion, saidterminal portion having at least one substantially radial side edge; anda terminal including a pair of angularly disposed integral legs eachjoined to the other at one end, the terminal being mounted on saidterminal portion such that one leg of the terminal abuts the radial sideedge and extends transversely of and away from the body and the otherleg extends around the terminal portion thereby to hold the terminal inplace, said other leg projecting from its extension around said terminalportion away from the tubular body in a direction transverse of both thelength of the tubular body and the length of said one leg.

References Cited in the file of this patent UNITED STATES PATENTS1,100,973 France Apr. 13,

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